Method of manufacture of rosin soap and the like.



A. W. GARMIGHAEL: METHOD OF MANUFACTURE OF ROSIN SOAP AND THE LIKE. APPLICATION FILED 00T.16, 1907.

99 3351 B Patented Jan. 5, 1909.

W/TNESSES WVE/Vml? ATTORNEYS ANDERSON w. CARMICHAEL, oF s vANNAa, GEORGIA. METHOD OF MANUFAGT' URE OF"ROSII\l AND LIKE.

P'at'e'ntedifhn. 5, 1909.

Application filed October 16,1907. Serial No. 397,652.

To all whom at may concern:

Be it known that I, ANDERSON W. CAR- MIEHAE'L, a citizen of the United States, and a resident of Savannah, in the county of Chatham and State of Georgia, have invented a new and Improved Method of Manufacture of Rosin Soap and the Like, of which the following is a full, clear, and exact description.

This invention is an improved method for de-hydrating a saponified solution of rosin, commonly called wet pulpy size, in the production of hard rosin soap, which is more especially used by paper mills in the so-called sizing or waterproofing process.

Prior to my invention, the manufacture of rosin soap, without the addition of an excess of soda, carbonate of soda or other equivalent compound, has been confined to soft soap containing from forty to sixty per cent. or more, of water. This soap necessarily has tobe packed in the better class of hard Wood and waterproof barrels, whereas the soap produced by my process permits of its shipment in a condensed state in cheap pine wood boxes or barrels in which the rosin has been and is still being shipped, in addition to offering a considerable saving in freight, as substantially no water is transported.

Reference is to be had to the accompanying drawings forming a part of this specification, inwhich similar characters of reference indicate corresponding parts in both views.

Figure 1 is a vertical central sectional view through an apparatus for the production of hard rosin soap and the like by my improved method; and Fig. 2 is a plan of the same.

An apparatus for carrying out my process comprises a cookin vessel 5 of suitable capacity, preferaily of cylindrical form and surrounded by a steam jacket 6, the latter being provided with a steam supply 7. J ournaled in the center of the vessel is a vertical shaft 8, having affixedthereto slightly below the top of the vessel, a series of radiating arms or blades providing a beater 9, and also with apulley or other suitable driving means 10, fixed above the heater. f'

Connecting with the bottom of the vessel 5 through a pipe 11, is a rotary pump 12,

which discharges through a pipe 13, having the discharge end thereof overhanging-the vessel above the beater 9. The apparatus is also preferably provided with a supply pipe 14, for introducing the size into the vessel.

In carrying out my improved method, a mixture of certain proportions of rosin in its crude state, and} alkali, is introduced intothe vessel and brought to the state of saponification by the steam in the steam jacket. To this is added the usual proportion of Water, and is commonly known as wet pulpy size,

which is used for the so-called sizmg or waterproofing process by the mills producing paper. When the size has been consistently heated to the point Where it .starts to foam, the foam beater 9 is set in action, beating down the foam as it rises, keeping it from running over thetop and to waste, and thus liberating the vapor; at the same time the rotary pump 12 is started and pumps the size from the bottom of the tank through the outlet or discharge pipe 11 and discharges the size into the top of the tank above the beater,

thereby providing a continuous flow from the bottom to the surfaceiof the liquid, which facilitates the evaporation of the water;

This operation is continued until substantially no water remains, when the resulting product on cooling will be found to be a hard rosin soap or size of superior quality,

entirely uniform in strength purity and solubility. I &

Having (thus described my invention, I

claim as new and desire to secure by Letters Patent:

-1. The herein-described method of pro-.

ducing hard rosin soap, which consists in heating a saponified solution of rosin and striking the foam rising at the surface of said solution to break the bubbles and liberate the vapor.

. 2. The herein described method of pro..- ducing hard rosin soap, which consists in heating a saponified solution of rosin, heating down the foam rising at the surface of said solution to liberate the vapor and pre- 1 vent the overflow ofthe foam, and withdrawing said solution from the under surface and discharging it over the surface thereof.

' 8. The herein described method of pro ducing hard rosin soap, which consists in heating within a vessel a saponified solution of beating down'the' (0pm i'ising at the mime to this specification in the p of suzface of saim}1 aoflutiqnfto llberarta the vapgr two subscribing wimm an revent t e 0am rom ove owm t e. v

vveasefi and withdrawin slaid solution tom I 43 '1 0 the bottom ofthe vesae and discharging it. Witnessesz. I e

therein over the surface of th'efsolut io h." 1 4 W. HoL 'r,

In testimqny whereof I have signed my e I JQHNHIA'DAVIS. v 

